Its ultimate purpose is to produce a digital critical edition, fully annotated, of everything Mark Twain wrote. MTPO is produced by the Mark Twain Papers and Project of The Bancroft Library in collaboration with the
University of California Press; the site is hosted by UC Berkeley's Library Systems Office. During 2005–8 the California
Digital Library collaborated in MTPO's creation and initial development.

In April 2009, the MLA Committee on Scholarly Editions designated MTPO an "Approved
Edition."

Now Online

“You don't know about me, without you have read a book by the name of ‘The Adventures of Tom
Sawyer,’ but that ain't no matter. That book was made by Mr. Mark Twain, and he told the truth, mainly.”Adventures of Huckleberry Finn